Interesting to see that I had a C++ REPL on my system, installed with clang by default, all along. From the documentation, it seems this is primarily aimed at

Interesting to see that I had a C++ REPL on my system, installed with clang by default, all along. From the documentation, it seems this is primarily aimed at incremental compilation on demand via Compiler As A Service. Indeed, for an end-user, calling this a REPL seems to be a stretch. There's no auto-completion or special commands like showing docs or the checking the type of things, you even have to #include <iostream> to manually print the results of simple expressions. So I guess read-eval-loop would be more fitting :)